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Lighting device with adjustable color temperature

  • US 8,816,590 B2
  • Filed: 09/02/2011
  • Issued: 08/26/2014
  • Est. Priority Date: 11/15/2010
  • Status: Active Grant
First Claim
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1. A lighting device with adjustable color temperature comprising:

  • a power, a driver, and a plurality of branches, the power electrically connecting to the driver, the driver respectively connecting to each of the branches, the branches connecting with each other in parallel, wherein each of the branches includes a light source and an adjustor connected in series, the adjustor adjusts a brightness of the light source by controlling a voltage of each of the branches, and the color temperatures of the light sources of at least two of the branches are different, wherein the number of the branches is two, and the branches are respectively a first branch and a second branch, and wherein the light source of the first branch is cool light source, a color temperature of the light source of the first branch is higher than 4000K, the light source of the second branch is warm light source and a color temperature of the light source of the second branch is lower than 4000K.

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